Magnesium deficiency occurs when the body does not have enough magnesium, an essential mineral that plays a crucial role in various bodily functions. It is important for muscle and nerve function, blood sugar control, and bone health. Symptoms of deficiency can include muscle cramps, fatigue, and irritability. Several factors can contribute to magnesium deficiency, such as poor diet, certain medical conditions, and the use of specific medications. Foods rich in magnesium include leafy greens, nuts, seeds, and whole grains. Addressing deficiency often involves dietary changes or supplements to restore adequate levels of this vital mineral.